Screen (G2); Method Of Settingthe Service Adjustment Mode; White Balance Adjustment - Sony TRINITRON KV-20M20 Service Manual

3-3. FOCUS
Adjust FOCUS control for best picture.
SCREEN (G2)
3-4. SCREEN (G2)
1. Input a dots pattern.
2. Set the PIC, BRT controls at minimum and COLOR
contro] at normal.
3. Adjust S BRT, G CUT, B CUT in service mode so that
voltages on the red, green, and blue cathodes are 170V
de with an oscilloscope as shown in Fig. 11.
4. Observe the screen and adjust SCREEN (G2)VR to
obtain the faintly visible background of dot signal.
|
170 V de pedestal
|
GND
Fig. 11
3-5. METHOD OF SETTINGTHE SERVICE
ADJUSTMENT MODE
SERVICE MODE PROCEDURE
1. Standby mode. (Power off)
2. [DISPLAY] +3] >[VOUG)-[POWER Jon tne
Remote Commander. (Press each button within a
second.)
SERVICE ADJUSTMENT MODE IN
Disp. tem
(Item) data
3. The CRT displays the item being adjusted.
4. Press [I] or[4] on the Remote Commander to select the
item.
5. Press [3] or [6] on the Remote Commander to change the
data.
6. Press |MUTING} then LENTER |to write into memory.
SERVICE ADJUSTMENT MODE MEMORY
SERVICE WRITE
Green
L
Red
7. Turn set off and on to exit.
3-6. WHITE BALANCEADJUSTMENTS
1. Input an entire white signal.
2. Set to service adjustment mode.
3. Set the PICTURE and BRIGHT to minimum.
4. Adjust with SBRT if necessary.
5. Select G CUT and B CUT with[T] and [4].
6. Adjust with [3] and [6] for the best white balance.
7. Set the PICTURE and BRIGHT to maximum.
8. Select GDRV and BDRV with [1] and [4].
9. Adjust with[3] and[6] for the best white balance.
10. Write into the memory by pressing] MUTING] then
ENTER | .
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